title: Crescentic glomerulonephritis accompanied by myeloperoxidase-antineutrophil cytoplasmic antibodies in a patient having myelodysplastic syndrome with trisomy 7.
abstract: A 63-year-old woman developed rapidly progressive glomerulonephritis syndrome with serum myeloperoxidase-anti-neutrophil cytoplasmic antibodies (MPO-ANCA). A renal biopsy showed diffuse crescentic glomerulonephritis. Immunofluorescence and electron microscopic studies showed no significant deposits in the glomeruli. The morphological findings were consistent with pauci-immune type crescentic glomerulonephritis. In addition, the patient had erythropoietin-resistant anemia and subsequent pancytopenia. Bone marrow was normocellular without an excess of blasts. However, multinuclear erythroblasts, hypersegmented neutrophils, and megakaryocytes without platelet formation were observed. Chromosome analysis of the bone marrow showed 47,XX,+7. This is the first case of MPO-ANCA-related crescentic glomerulonephritis in a patient with myelodysplastic syndromes (MDS). A possible relationship between MPO-ANCA and MDS is discussed.
authors.affiliation: Third Department of Internal Medicine, Akita University School of Medicine, Hondo, Japan. komatsud@med.akita-u.ac.jp
authors.forename: A
authors.initials: A
authors.lastname: Komatsuda
authors.forename: I
authors.initials: I
authors.lastname: Miura
authors.forename: H
authors.initials: H
authors.lastname: Ohtani
authors.forename: K
authors.initials: K
authors.lastname: Hamai
authors.forename: H
authors.initials: H
authors.lastname: Wakui
authors.forename: H
authors.initials: H
authors.lastname: Imai
authors.forename: Y
authors.initials: Y
authors.lastname: Kobayashi
authors.forename: A B
authors.initials: AB
authors.lastname: Miura
authors.forename: A
authors.initials: A
authors.lastname: Chubachi
mesh_terms: D019268:Antibodies, Antineutrophil Cytoplasmic / Q000032:analysis*; D001323:Autoantibodies / Q000032:analysis*; D001853:Bone Marrow / Q000473:pathology; D002897:Chromosomes, Human, Pair 7; D005260:Female; D005921:Glomerulonephritis / Q000150:complications* / Q000235:genetics / Q000276:immunology / Q000473:pathology; D006801:Humans; D007668:Kidney / Q000473:pathology; D008875:Middle Aged; D009190:Myelodysplastic Syndromes / Q000150:complications* / Q000235:genetics / Q000473:pathology; D009195:Peroxidase / Q000276:immunology*; D014314:Trisomy
chemical_list: D019268:Antibodies, Antineutrophil Cytoplasmic; D001323:Autoantibodies; D009195:Peroxidase